maybe is the simple answer,

partimage is the program to look at

http://www.partimage.org/Main_Page

i use it via knoppix live cd as you cannot image a mounted drive – so its a waste of time installing partimage on the first centos and trying to image it

you may need to install centos on an intel and an amd and image both,
only takes a few mins to image though

There is another one you can try called Clonezilla: http://www.clonezilla.org/

Some of the testimonials are interesting:

Wes Kennedy
Location: Tampa Bay area, FL, USA.

Now we can image any PC within our 25 subnets at 20 different offices without traveling to their location.

“I work for a large Health Care company who has around 1700 desktops in our HomeCare division and more than 500 laptops for our nurses. The nurses often manage to mess up the laptops by using them for much more than work so we often have to re-image them. We recently had to image 173 HP Mini’s to distribute to our nurses. Our old procedure would have taken us about 2 months of constant work to get them prepared, so I decided to go out and find a better solution. I built a CloneZilla server based on Fedora 10 and I alone imaged the 173 laptops in 3 days. The only reason it wasn’t any faster was because I didn’t have the physical space to set up more laptops at once for the multicast image. The bonus of having the CloneZilla server is now we can image any PC within our 25 subnets at 20 different offices without traveling to their location. Clonezilla allows us to image from a Samba share!” — Wes Kennedy, FL, USA. 04 Mar, 2010.